P1721

Test 1 Through 2:

Test 3 Through 6:

Test 7 Through 11:

Test 12 Through 13:

Symptom:
P1721-LINE PRESSURE SENSOR FAULT

When Monitored and Set Condition
P1721-LINE PRESSURE SENSOR FAULT

When Monitored:Continuously with engine running.

Set Condition: If the Line Pressure Sensor (LPS) voltage is below 0.2 volts or above 4.75 volts the code will be set.

POSSIBLE CAUSES
INTERMITTENT WIRING & CONNECTORS CONDITIONS
GROUND CIRCUIT OPEN
LINE PRESSURE SENSOR SIGNAL CIRCUIT OPEN
LINE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
LINE PRESSURE SENSOR
5-VOLT SUPPLY CIRCUIT OPEN
5-VOLT SUPPLY CIRCUIT SHORT TO GROUND
LINE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
TCM HI (LINE PRESSURE SENSOR)
TCM LO (LINE PRESSURE SENSOR)